Specifications

6.1Deadriseangle
Thedeadriseangleistheangleofthevesselshullfromthe
centerline.
D12955-1
2
3
1
4
1Waterline
2
Centerline
3DeadRiseAngle
4Parallelwithwaterline
Thedeadriseangleshouldbemeasuredontheoutsideofthe
hullusingananglenderorsimilardevice.
Exampledeadriseangles
0
o
24
o
33
o
D12956-1
•Bronzetransducer—Thedeadriseblockisnotrequiredon
hullswithaatbottom.Forhullswithadeadriseanglethe
blockshouldalwaysbeused.
•Plastictransducer—OnahullwithaatbottomtheDead
riseblockdoesnotrequirecuttingandshouldbeusedinside
thehull.Forhullswithadeadriseangletheblockshould
alwaysbeused.
CuttingtheDeadriseblock
Unlessthevesselhullhasaatbottom,theDeadriseblock
mustbecuttotheshapeofthehull,doNOTovertightenthe
nutinanattempttocloseanygapsbetweentheblockandhull
asthismaydamagethetransducerandDeadriseblock.The
Deadriseblockisnotsuitableforvesselswithadeadriseangle
greaterthan25degrees.
D12957-1
2 3 4
1
5
1
DeadRiseblock(Frontofblockfacingforward)
2Paralleltowaterline
3
4mm(0.16in)gapminimum
4
Slopeofhull
5
Deadriseangle25degreesmaximum
1.Calculatethedeadriseangle.
Thedeadriseangleshouldbemeasuredontheoutsideof
thehullfromthelocationthatthetransduceristobemounted
usingananglenderorsimilardevice.
2.Adjustthebandsawtabletothemeasuredangleofyour
deadrise
3.Positionthedeadriseblockonthebandsawtablesothat
thetopoftheblockisagainstthebandsaw’scuttingguide.
4.Ensurethattheblockiscorrectlyorientated,thearrowontop
oftheDeadriseblockshouldbepointingtowardsthebow
ofthevessel.
5.PositiontheDeadriseblockandcuttingguidesothatthecut
willcreate2equallysizedparts.
Note:Youmustleaveaminimumof4mm(0.16in)gapfrom
thebottomoftheDeadriseblockasshowninthediagram
above.
6.Rechecksteps1to5.
7.Cuttheblock.
D12958-1
2
3
1
4
Retainthetophalfoftheblockasthiswillprovidealevel
surfaceinsidethehulltotightenthenutagainst.
8.Checkthebottomhalfofthedeadriseblockagainstthehull
toensureagoodt.
Ensurethattheblockrunsparalleltothecenterlineofthe
vessel.
9.Iftherearegapsbetweentheblockandhullthenusean
appropriateletoshapetheblockuntilaprecisiontis
achieved.
Removingdeadriseblocklocators
Wheninstallingtheplastictransduceronavesselwithnodead
riseyoumustremovethelocatorsfromthebottomofthedead
riseblock.
D12959-1
2 2
1
1Deadriseblock
2
locators(forlocatingonthetransducer)
1.Removethedeadriseblockfromthetransducer.
2.Usingasuitablesaw,cutthelocatorsfromthebottomofthe
block.
Theblockisnowreadytobeusedinsidethehullasdescribedin
theMountingthetransducerinahullwithoutadeadrisesection.
26CPT-70/CPT-80/CPT-110/CPT-120